1
2 /*--------------------------------------------------------------------*/
3 /*--- Address Description. ---*/
4 /*--- hg_addrdescr.c ---*/
5 /*--------------------------------------------------------------------*/
6
7 /*
8 This file is part of Helgrind, a Valgrind tool for detecting errors
9 in threaded programs.
10
11 Copyright (C) 2007-2017 OpenWorks Ltd
12 info@open-works.co.uk
13
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License as
16 published by the Free Software Foundation; either version 2 of the
17 License, or (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 02111-1307, USA.
28
29 The GNU General Public License is contained in the file COPYING.
30 */
31 #include "pub_tool_basics.h"
32 #include "pub_tool_libcbase.h"
33 #include "pub_tool_libcprint.h"
34 #include "pub_tool_libcassert.h"
35 #include "pub_tool_wordfm.h"
36 #include "pub_tool_xarray.h"
37 #include "pub_tool_execontext.h"
38 #include "pub_tool_debuginfo.h"
39 #include "pub_tool_threadstate.h"
40 #include "pub_tool_aspacemgr.h"
41 #include "pub_tool_addrinfo.h"
42
43 #include "hg_basics.h"
44 #include "hg_wordset.h"
45 #include "hg_lock_n_thread.h"
46 #include "hg_addrdescr.h" /* self */
47
HG_(describe_addr)48 void HG_(describe_addr) ( Addr a, /*OUT*/AddrInfo* ai )
49 {
50 tl_assert(ai->tag == Addr_Undescribed);
51
52 /* hctxt/tnr/haddr/hszB describe the addr if it is a heap block. */
53 ExeContext* hctxt;
54 UInt tnr;
55 Addr haddr;
56 SizeT hszB;
57
58 /* First, see if it's in any heap block. Unfortunately this
59 means a linear search through all allocated heap blocks. The
60 assertion says that if it's detected as a heap block, then we
61 must have an allocation context for it, since all heap blocks
62 should have an allocation context. */
63 Bool is_heapblock
64 = HG_(mm_find_containing_block)(
65 &hctxt,
66 &tnr,
67 &haddr,
68 &hszB,
69 a
70 );
71 if (is_heapblock) {
72 tl_assert(is_heapblock == (hctxt != NULL));
73 ai->tag = Addr_Block;
74 ai->Addr.Block.block_kind = Block_Mallocd;
75 ai->Addr.Block.block_desc = "block";
76 ai->Addr.Block.block_szB = hszB;
77 ai->Addr.Block.rwoffset = (Word)(a) - (Word)(haddr);
78 ai->Addr.Block.allocated_at = hctxt;
79 VG_(initThreadInfo) (&ai->Addr.Block.alloc_tinfo);
80 ai->Addr.Block.alloc_tinfo.tnr = tnr;
81 ai->Addr.Block.freed_at = VG_(null_ExeContext)();;
82 } else {
83 /* No block found. Search a non-heap block description. */
84 VG_(describe_addr) (a, ai);
85
86 /* In case ai contains a tid, set tnr to the corresponding helgrind
87 thread number. */
88 if (ai->tag == Addr_Stack) {
89 Thread* thr = get_admin_threads();
90
91 tl_assert(ai->Addr.Stack.tinfo.tid);
92 while (thr) {
93 if (thr->coretid == ai->Addr.Stack.tinfo.tid) {
94 ai->Addr.Stack.tinfo.tnr = thr->errmsg_index;
95 break;
96 }
97 thr = thr->admin;
98 }
99 }
100 }
101 }
102
HG_(get_and_pp_addrdescr)103 Bool HG_(get_and_pp_addrdescr) (Addr addr)
104 {
105
106 Bool ret;
107 AddrInfo glai;
108
109 glai.tag = Addr_Undescribed;
110 HG_(describe_addr) (addr, &glai);
111 VG_(pp_addrinfo) (addr, &glai);
112 ret = glai.tag != Addr_Unknown;
113
114 VG_(clear_addrinfo) (&glai);
115
116 return ret;
117 }
118
119 /*--------------------------------------------------------------------*/
120 /*--- end hg_addrdescr.c ---*/
121 /*--------------------------------------------------------------------*/
122